Tree preservation zone

There is a problem

1000 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: 798
name: THE BIRMINGHAM (FORMER PARK VIEW SCHOOL NORTHLEIGH ROAD, WARD END) TPO 1999
tree-preservation-order: undefined
TPO 798
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.835609 52.496108,-1.834875 52.496245,-1.834962 52.496362,-1.835031 52.496433,-1.835172 52.496542,-1.835271 52.496598,-1.835373 52.496645,-1.835527 52.496700,-1.835684 52.496742,-1.836101 52.496827,-1.836217 52.496864,-1.836410 52.496942,-1.836654 52.497097,-1.837381 52.497028,-1.837644 52.496698,-1.837743 52.496677,-1.837848 52.496546,-1.837366 52.496401,-1.837194 52.496399,-1.837070 52.496409,-1.835609 52.496108)))
point: POINT (-1.836396 52.496582)
notes: The shaded area represents those properties which fall within the outline of a Tree Preservation Order. To precisely identify trees protected by the Order, you can request a copy of the tree preservation order at the following link.
organisation
entry-date: 2025-11-30
start-date
end-date

Your dataset is missing the tree-preservation-order column.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.